{
  "manageEntity": {
    "action": "Save",
    "entityId": "1852205167",
    "entityType": "Track",
    "nonce": "0x07d1249df423934f366556a37a300fa4f80b4501201a1d02756e5336829619a6",
    "signature": "0xaf147bafbed4018af9630fa6cb40cd6d49159bd45ed32f887bb9ff682b3ed56b7e7636c8385b2d78bd89e2df518a50860b6203cd0504ef0e4aa80a8cf3abe18d1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}